Article
Chemistry, Analytical
Christian Baker, Miguel Xochicale, Fang-Yu Lin, Sunish Mathews, Francois Joubert, Dzhoshkun I. I. Shakir, Richard Miles, Charles A. A. Mosse, Tianrui Zhao, Weidong Liang, Yada Kunpalin, Brian Dromey, Talisa Mistry, Neil J. J. Sebire, Edward Zhang, Sebastien Ourselin, Paul C. C. Beard, Anna L. L. David, Adrien E. E. Desjardins, Tom Vercauteren, Wenfeng Xia
Summary: Ultrasound needle tracking is an essential tool for minimally-invasive procedures. This study presents a new real-time ultrasound needle tracking system for guidance of fetal interventions, demonstrating its accuracy and clinical compatibility.
Article
Engineering, Electrical & Electronic
Zhihui Luo, Shuai Ding, Chao Tan, Bing Xu, Bo Lu, Jianglou Huang
Summary: A low-frequency hydrophone based on ultra-weak fiber Bragg grating (UWFBG) was developed, and its sensitivity was optimized by analyzing the hydrophone principle and factors such as the material, radius, and thickness of the elastic cylindrical shell. The system's signal-to-noise ratio (SNR) was improved by introducing an adaptive filtering technique based on the least mean square (LMS) algorithm. The results showed that the hydrophone had high sensitivity and SNR, making it a valuable tool for low-frequency underwater detection.
IEEE SENSORS JOURNAL
(2023)
Article
Physics, Multidisciplinary
Bing-Wen An, Jia-Yi Chen, Fei-Ran Li, Zi-Qi Li, Xian-Mei Wu
Summary: Research on the directional sensing characteristics of p-phase-shifted fiber Bragg grating as a hydrophone is conducted by calculating the strain of fiber core and the wavelength shift in the optical reflection spectrum. The results show that larger wavelength shift occurs at lower frequency and at vertical incidence.
ACTA PHYSICA SINICA
(2023)
Article
Optics
Shuting Liu, Qingwen Liu, Shuangxiang Zhao, Zuyuan He
Summary: In this letter, a white-light-driven self-reference sensing system with fiber Bragg gratings (FBGs) is proposed to achieve multiplexed high-resolution vibration sensing. The system demonstrates a high strain resolution and no observable cross talk.
Article
Multidisciplinary Sciences
Keivan Mahmoud Aghdami, Abdullah Rahnama, Erden Ertorer, Peter R. Herman
Summary: This study explores the use of ultrashort-pulsed laser filaments to create high density arrays of laser filamented holes in optical fiber, resulting in high refractive index contrast Bragg gratings for telecommunications. The technique combines point-by-point fabrication with post-chemical etching to engineer strong photonic stopbands directly inside the compact and flexible fiber, allowing for high resolution refractive index sensing.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Sandra Drusova, Wiecher Bakx, Pieter J. Doornenbal, R. Martijn Wagterveld, Victor F. Bense, Herman L. Offerhaus
Summary: The experiment evaluated the performance of three different fiber optic sensors in groundwater temperature monitoring, showing that they had comparable accuracy and resolution. When choosing a sensor for groundwater temperature monitoring, factors to consider include spatial resolution, sampling frequency, and the ability to measure absolute/relative temperature.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Electrical & Electronic
Ming Ding, Tianxi Zhang, Ruohui Wang, Dan Su, Xueguang Qiao
Summary: A low-flow flowmeter based on the bending measurement of a cladding fiber Bragg grating (CLFBG) is proposed and demonstrated. The CLFBG is fixed in a cantilever beam structure composed of a spring and a circular target. The sensor responds in the range of 0-87 mm/s and has extremely low-temperature cross-sensitivity. It has potential application prospects in high-precision, low-start flow measurement and can be applied to oil pipelines, downhole, and other fields.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Physical
Magdalena Mieloszyk, Katarzyna Majewska, Artur Andrearczyk
Summary: This research analyzed the influence of embedded fibre Bragg grating (FBG) sensors on the durability of additive manufacturing (AM) polymer elements. The results showed that the embedded FBG sensors had no impact on the mechanical durability of the elements.
Article
Mechanics
Torkan Shafighfard, Magdalena Mieloszyk
Summary: This article analyzes the performance of additively manufactured (AM) Carbon Fiber Reinforced Polymer (CFRP) samples with Fiber Bragg Grating (FBG) sensors under the influence of environmental factors. It investigates the durability of AM elements and the influences of embedded FBG sensors on composite specimen using environmental tests and Finite Element Method (FEM) modeling.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Electrical & Electronic
Hanqi Zhang, Hengtian Zhu, Qi Wu, Ye Chen, Rong Wang, Fei Xu, Ke Xiong
Summary: In this study, a microfiber Bragg grating (MFBG) bonded using tapered cantilever was designed and investigated using experimental, theoretical, and numerical methods. The tapered structure amplified the ultrasonic signal and eliminated the influences of static strain and evanescent field using the cantilever. Compared to the cantilevered fiber Bragg grating, the sensitivity of the sensor showed an upward trend with decreasing diameter, with 331% and 108% sensitivity increments observed for MFBGs with 20 and 40 μm diameters, respectively. The improvement was particularly apparent at high frequencies of the ultrasonic signal.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Alessandra Kalinowski, Rafael P. Linessio, Celso J. A. Mendonca, Uilian J. Dreyer, Paulo Antunes, Antonio Ramos, Jean Carlos Cardozo da Silva
Summary: This study aimed to evaluate the evolution of bone callus using a synthetic femur and in vivo subject for testing, with Fiber Bragg Grating sensors for analysis of static and dynamic strain. Results showed technical feasibility of using FBG sensors to detect bone callus healing stage, with the need for a comprehensive study using more subjects.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Mechanical
Simone Weber, Thomas Kissinger, Edmond Chehura, Stephen Staines, James Barrington, Kevin Mullaney, Luca Zanotti Fragonara, Ivan Petrunin, Stephen James, Mudassir Lone, Ralph Tatam
Summary: This paper compares two fiber optic sensing techniques for vibration characterization: optical fiber Bragg grating (FBG) strain gauges and a novel direct fiber optic shape sensing (DFOSS) approach based on differential interferometric strain measurements. The experimental results demonstrate the potential of both fiber optic sensing systems in identifying the natural frequencies of the blade, with careful consideration needed for complete characterization of the blade's vibration mode shapes in terms of sensor positioning.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Review
Engineering, Multidisciplinary
Amir Rostami, Fatai Adisa Wahaab, Hassan Soleimani, Surajudeen Sikiru, Vahid Khosravi, Afeez Oluwatobi Yusuff, Mohammed Falalu Hamza
Summary: Fiber Bragg Grating (FBG) magnetic field sensors have emerged as a promising alternative for magnetic field sensing, offering compact size and simplified fabrication. This review discusses the three primary magneto-optic mechanisms for magnetic field sensing: Faraday effect, magnetic fluid, and magnetostrictive materials. Each method has its advantages and disadvantages, and future research should focus on addressing challenges to enhance the reliability of FBGs for magnetic sensing.
Article
Optics
Wen-Fung Liu, Jia-Guan Li, Hung-Ying Chang, Ming-Yue Fu, Chi-Fang Chen
Summary: A new type of fiber hydrophone composed of etched fiber Bragg grating and a special packaging structure is proposed for detecting low-frequency acoustic waves in water. The operating mechanism is based on the mechanical vibration of the fiber Bragg grating induced by acoustic pressure. Experimental results show that the smaller the fiber diameter, the higher the sensitivity and frequency response. The fiber grating hydrophone has better responsivity compared to conventional hydrophones due to its unique sensing structure design.
Article
Engineering, Electrical & Electronic
Chaoyang Shi, Dewei Lai, Zhongxin Tang, Zhan Yang
Summary: This paper proposes a miniature and high-sensitivity torque sensor for minimally invasive surgery robots and multi-finger robotic hands. The sensor consists of a torquesensitive flexure and a suspended optic fiber with a Fiber Bragg Grating (FBG) element, providing excellent resistance to moment loadings and high resolution.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Yanjun Zhang, Lizhi Wang, Pinggang Jia, Chengrui Zhai, Guowen An, Lei Liu, Fengtong Zhu, Jianhui Su
Summary: In this study, a cascaded dual-core photonic crystal fiber (DC-PCF) refractive index sensor is proposed and its high sensitivity and resolution are demonstrated. By cascading and filling different refractive indices in the central air hole, the sensor achieves the vernier effect and shows a 37-fold sensitivity improvement compared to traditional DC-PCF.
Article
Engineering, Electrical & Electronic
Jiashun Li, Pinggang Jia, Guocheng Fang, Jun Wang, Jiang Qian, Qianyu Ren, Jijun Xiong
Summary: In this study, an all-silica fiber-optic Fabry-Perot pressure sensor with excellent high-temperature survivability and low thermal drift was developed. Experimental results demonstrated that the sensor could operate stably from room temperature up to 800 degrees C, making it suitable for gas pressure detection in high-temperature environments.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Optics
Jiashun Li, Pinggang Jia, Jiang Qian, Jun Wang, Guowen An, Jijun Xiong
Summary: This paper presents the design and fabrication of an all-silica microsphere-lens on the fiber end face to improve the coupling efficiency of free-space light. The microsphere-lens diameter can be adjusted by controlling the light-passing time of the CO2 laser fusion splicer. Experimental results demonstrate the feasibility and performance of the microsphere-lens in fiber-optic sensors.
Article
Chemistry, Analytical
Jiang Qian, Pinggang Jia, Qianyu Ren, Hua Liu, Li Qin, Jijun Xiong
Summary: This paper designs and experimentally demonstrates a high-temperature fiber-optic Fabry-Perot accelerometer (FOFPA), which has the potential of being applicable in higher temperatures compared to conventional accelerometers.
Article
Chemistry, Analytical
Suwei Wang, Jun Wang, Wenhao Li, Yangyang Liu, Jiashun Li, Pinggang Jia
Summary: In this paper, a high-fineness fiber-optic Fabry-Perot high-temperature pressure sensor based on MEMS technology is proposed and experimentally verified. The sensor has high pressure sensitivity and temperature tolerance, making it suitable for high-temperature pressure testing.
Article
Crystallography
Cheng Lei, Qiang Li, Ting Liang, RuiFang Liu, YongWei Li, XingJian Zhou, Pinggang Jia, Abdul Ghaffar, JiJun Xiong
Summary: This paper studied the ohmic contact of domestic p-type 4H-SiC epitaxial materials. The results showed that an ohmic contact with a specific contact resistivity could be formed by annealing a Ni/Al/Au-based metal system at a specific temperature, and the metal system showed applicability in a 600 degree C environment. XRD results indicated that the main phases formed after annealing were Ni2Si and Al3C4, which were the main reasons for the formation of the ohmic contacts.
JOURNAL OF CRYSTAL GROWTH
(2022)
Review
Chemistry, Multidisciplinary
Xin Guo, Yajun You, Aida Bao, Pinggang Jia, Jijun Xiong, Junshuai Li
Summary: The interest in field electron emission cathode nanomaterials is increasing due to their wide range of applications. Nanodiamond (ND) film is considered an ideal cathode emitter in field emission devices because of its unique properties. This review summarizes recent research on ND film electron field emitters, highlighting new findings and discussing future developments. Methods for large-scale, high-quality, and cost-effective synthesis of ND films are discussed, as well as strategies to improve field emission performance. Challenges and prospects in this area are also discussed.
Article
Engineering, Electrical & Electronic
Zhengqiang Yan, Shanshan Zhu, Yanjun Zhang, Pinggang Jia, Jia Liu, Lei Liu, Fengtong Zhu, Huiqing Niu, Guowen An
Summary: A sensor for pressure and temperature detection based on dual Fabry-Perot interferometers and fiber Bragg grating in a hollow silica microsphere-cavity structure is proposed. The sensor achieves simultaneous detection of temperature and pressure by utilizing the Vernier effect and the length change of the microsphere F-P cavity caused by external pressure. With temperature sensitivity of 14.3 pm/degrees C and pressure sensitivity of 49.5 nm/MPa, the sensor demonstrates pressure detection at 300 degrees C ranging from 0 to 0.8 MPa. It has the advantages of temperature compensation, high production efficiency, low cost, robustness, and self-encapsulation, making it promising for high-temperature and high-pressure detection.
IEEE SENSORS JOURNAL
(2023)
Review
Optics
Qianyu Ren, Pinggang Jia, Guowen An, Jia Liu, Wenyi Liu, Jijun Xiong
Summary: This study proposes a self-compensation three-wavelength demodulation method for interrogating fiber-optic extrinsic Fabry-Perot interferometric (EFPI) sensors. It uses three signals with different wavelengths to extract the variation in EFPI cavity lengths. The demodulation method improves the accuracy by stabilizing the phase difference using the demodulated EFPI cavity length.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Chemistry, Analytical
Hua Liu, Pinggang Jia, Chengxin Su, Aihao Zhao, Jia Liu, Qianyu Ren, Jijun Xiong
Summary: This paper proposes a fiber-optic Fabry-Perot (F-P) vibration sensor that operates at 800 ?. The sensor is composed of an inertial mass on the upper surface parallel to the end face of the optical fiber. With a sensitivity of 0.883 nm/g and a resonant frequency of 20.911 kHz, the sensor was prepared using ultraviolet-laser ablation and three-layer direct-bonding technology. Experimental results demonstrate a sensitivity of 0.876 nm/g in the range of 2 g to 20 g at an operating frequency of 200 Hz at 20 ?. The sensor's nonlinearity was evaluated from 20 ? to 800 ? with a nonlinear error of 0.87%. Furthermore, the z-axis sensitivity of the sensor is 25 times higher than the x-axis and y-axis. The vibration sensor shows promising prospects for high-temperature engineering applications.
Article
Optics
Yanan Niu, Pinggang Jia, Jianhui Su, Jingyi Wang, Guowen An, Qianyu Ren, Jijun Xiong
Summary: We propose a tunable random fiber laser based on the combination of random grating and highly reflective fiber Bragg grating to reduce the pumping threshold and achieve a short-cavity single-mode transmission with a narrow-linewidth. The random grating is regarded as a linear combination of uniform fiber gratings with different periods. We constructed a random fiber laser with a linewidth of 1.68 kHz and a threshold of 29.2 mW using the random grating and highly reflective FBG combined with an erbium-doped fiber. By changing the central wavelength of the high-reflection FBG, the tunable wavelength of the output laser was realized, and the tunable range was 0.847 nm (1549.110-1549.957 nm). The proposed laser has the advantages of a lower threshold, shorter cavity length, narrower linewidth, and a relatively simple structure compared with other lasers.
Article
Optics
G. U. O. W. E. N. AN, L. E. I. LIU, P. U. HU, P. I. N. G. G. A. N. G. JIA, F. E. N. G. T. O. N. G. ZHU, Y. A. N. J. U. N. ZHANG, J. I. A. LIU, J. I. J. U. N. XIONG
Summary: The tilted fiber Bragg grating (TFBG), chirped fiber Bragg grating (CFBG), Vernier effect, and metal surface plasmon resonance (SPR) effect are combined to form a probe type fiber sensor for simultaneous measurement of seawater salinity, temperature, and depth (STD). The TFBG excites SPR effect by covering a gold layer around it to measure the refractive index (RI) of seawater. The TFBG's core mode is used for detecting seawater temperature change, and the measurement of TFBG reflection spectrum is achieved by inscribing a CFBG after it, making the sensor have a probe type design and more practical applications. The fusion of quartz micro-spheres on the sensing fiber's end face and the parallel connection of a Fabry Perot (F-P) interference cavity enable the use of the Vernier effect to detect ocean depth.
Article
Optics
Ren Qianyu, Jia Pinggang, Qian Jiang, Wang Jun, Liu Wenyi, Xiong Jijun
Summary: This paper proposes an improved passive three-wavelength phase demodulation technology for dynamic measurement of the shortest cavity in a multi-cavity Fabry-Perot sensor. The experimental results demonstrate that the vibration signals can be successfully extracted with fast demodulation speed and high resolution. The demodulation technology can be used in combination with a spectrometer to interrogate dynamic and static signals simultaneously.
ACTA PHOTONICA SINICA
(2022)
Article
Optics
Li Jiashun, Jia Pinggang, Wang Jun, Liu Jia, An Guowen, Xiong Jijun
Summary: This article introduces the application of fiber-optic pressure sensors in dynamic pressure measurement in high-temperature and harsh environments, pointing out the advantages of fiber-optic pressure sensors including high-temperature resistance, high sensitivity, anti-electromagnetic interference, and small size. A MEMS-based all-silica fiber-optic Fabry-Perot dynamic pressure sensor is proposed, which can be applied to dynamic pressure monitoring in high-temperature environments and achieve the desired pressure measurement range and sensitivity by flexibly designing related parameters.
ACTA PHOTONICA SINICA
(2022)
Article
Computer Science, Information Systems
Jiang Qian, Pinggang Jia, Hua Liu, Qianyu Ren, Jia Liu, Li Qin, Jijun Xiong
Summary: This paper introduces an extrinsic high-temperature fiber-optic Fabry-Perot vibration sensor based on MEMS technology and demonstrates its performance through experiments. The sensor shows high stability and sensitivity, works reliably in high-temperature environments, and has a wide range of engineering applications.
